27 #include "classfile/systemDictionary.hpp"
28 #include "logging/log.hpp"
29 #include "logging/logStream.hpp"
30 #include "memory/iterator.hpp"
31 #include "memory/resourceArea.hpp"
32 #include "oops/oop.inline.hpp"
33 #include "oops/weakHandle.inline.hpp"
34 #include "utilities/hashtable.inline.hpp"
35
36 unsigned int ProtectionDomainCacheTable::compute_hash(Handle protection_domain) {
37 // Identity hash can safepoint, so keep protection domain in a Handle.
38 return (unsigned int)(protection_domain->identity_hash());
39 }
40
41 int ProtectionDomainCacheTable::index_for(Handle protection_domain) {
42 return hash_to_index(compute_hash(protection_domain));
43 }
44
45 ProtectionDomainCacheTable::ProtectionDomainCacheTable(int table_size)
46 : Hashtable<ClassLoaderWeakHandle, mtClass>(table_size, sizeof(ProtectionDomainCacheEntry))
47 {
48 }
49
50 void ProtectionDomainCacheTable::unlink() {
51 assert(SafepointSynchronize::is_at_safepoint(), "must be");
52 for (int i = 0; i < table_size(); ++i) {
53 ProtectionDomainCacheEntry** p = bucket_addr(i);
54 ProtectionDomainCacheEntry* entry = bucket(i);
55 while (entry != NULL) {
56 oop pd = entry->object_no_keepalive();
57 if (pd != NULL) {
58 p = entry->next_addr();
59 } else {
60 LogTarget(Debug, protectiondomain) lt;
61 if (lt.is_enabled()) {
62 LogStream ls(lt);
63 ls.print_cr("protection domain unlinked at %d", i);
64 }
65 entry->literal().release();
66 *p = entry->next();
67 free_entry(entry);
68 }
69 entry = *p;
70 }
71 }
72 }
73
74 void ProtectionDomainCacheTable::print_on(outputStream* st) const {
75 st->print_cr("Protection domain cache table (table_size=%d, classes=%d)",
76 table_size(), number_of_entries());
77 for (int index = 0; index < table_size(); index++) {
78 for (ProtectionDomainCacheEntry* probe = bucket(index);
79 probe != NULL;
80 probe = probe->next()) {
81 st->print_cr("%4d: protection_domain: " PTR_FORMAT, index, p2i(probe->object_no_keepalive()));
82 }
83 }
84 }
85
86 void ProtectionDomainCacheTable::verify() {
87 verify_table<ProtectionDomainCacheEntry>("Protection Domain Table");
88 }
89
90 oop ProtectionDomainCacheEntry::object() {
91 return literal().resolve();
92 }
93
94 oop ProtectionDomainEntry::object() {
107 }
108
109 void ProtectionDomainCacheEntry::verify() {
110 guarantee(object_no_keepalive() == NULL || oopDesc::is_oop(object_no_keepalive()), "must be an oop");
111 }
112
113 ProtectionDomainCacheEntry* ProtectionDomainCacheTable::get(Handle protection_domain) {
114 unsigned int hash = compute_hash(protection_domain);
115 int index = hash_to_index(hash);
116
117 ProtectionDomainCacheEntry* entry = find_entry(index, protection_domain);
118 if (entry == NULL) {
119 entry = add_entry(index, hash, protection_domain);
120 }
121 // keep entry alive
122 (void)entry->object();
123 return entry;
124 }
125
126 ProtectionDomainCacheEntry* ProtectionDomainCacheTable::find_entry(int index, Handle protection_domain) {
127 for (ProtectionDomainCacheEntry* e = bucket(index); e != NULL; e = e->next()) {
128 if (oopDesc::equals(e->object_no_keepalive(), protection_domain())) {
129 return e;
130 }
131 }
132
133 return NULL;
134 }
135
136 ProtectionDomainCacheEntry* ProtectionDomainCacheTable::add_entry(int index, unsigned int hash, Handle protection_domain) {
137 assert_locked_or_safepoint(SystemDictionary_lock);
138 assert(index == index_for(protection_domain), "incorrect index?");
139 assert(find_entry(index, protection_domain) == NULL, "no double entry");
140
141 ClassLoaderWeakHandle w = ClassLoaderWeakHandle::create(protection_domain);
142 ProtectionDomainCacheEntry* p = new_entry(hash, w);
143 Hashtable<ClassLoaderWeakHandle, mtClass>::add_entry(index, p);
144 return p;
145 }
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27 #include "classfile/systemDictionary.hpp"
28 #include "logging/log.hpp"
29 #include "logging/logStream.hpp"
30 #include "memory/iterator.hpp"
31 #include "memory/resourceArea.hpp"
32 #include "oops/oop.inline.hpp"
33 #include "oops/weakHandle.inline.hpp"
34 #include "utilities/hashtable.inline.hpp"
35
36 unsigned int ProtectionDomainCacheTable::compute_hash(Handle protection_domain) {
37 // Identity hash can safepoint, so keep protection domain in a Handle.
38 return (unsigned int)(protection_domain->identity_hash());
39 }
40
41 int ProtectionDomainCacheTable::index_for(Handle protection_domain) {
42 return hash_to_index(compute_hash(protection_domain));
43 }
44
45 ProtectionDomainCacheTable::ProtectionDomainCacheTable(int table_size)
46 : Hashtable<ClassLoaderWeakHandle, mtClass>(table_size, sizeof(ProtectionDomainCacheEntry))
47 { _dead_entries = false;
48 _total_oops_removed = 0;
49 }
50
51 void ProtectionDomainCacheTable::trigger_cleanup() {
52 MutexLockerEx ml(Service_lock, Mutex::_no_safepoint_check_flag);
53 _dead_entries = true;
54 Service_lock->notify_all();
55 }
56
57 void ProtectionDomainCacheTable::unlink() {
58 MutexLocker ml(SystemDictionary_lock);
59 int oops_removed = 0;
60 for (int i = 0; i < table_size(); ++i) {
61 ProtectionDomainCacheEntry** p = bucket_addr(i);
62 ProtectionDomainCacheEntry* entry = bucket(i);
63 while (entry != NULL) {
64 oop pd = entry->object_no_keepalive();
65 if (pd != NULL) {
66 p = entry->next_addr();
67 } else {
68 oops_removed++;
69 LogTarget(Debug, protectiondomain, table) lt;
70 if (lt.is_enabled()) {
71 LogStream ls(lt);
72 ls.print_cr("protection domain unlinked at %d", i);
73 }
74 entry->literal().release();
75 *p = entry->next();
76 free_entry(entry);
77 }
78 entry = *p;
79 }
80 }
81 _total_oops_removed += oops_removed;
82 _dead_entries = false;
83 }
84
85 void ProtectionDomainCacheTable::print_on(outputStream* st) const {
86 assert_locked_or_safepoint(SystemDictionary_lock);
87 st->print_cr("Protection domain cache table (table_size=%d, classes=%d)",
88 table_size(), number_of_entries());
89 for (int index = 0; index < table_size(); index++) {
90 for (ProtectionDomainCacheEntry* probe = bucket(index);
91 probe != NULL;
92 probe = probe->next()) {
93 st->print_cr("%4d: protection_domain: " PTR_FORMAT, index, p2i(probe->object_no_keepalive()));
94 }
95 }
96 }
97
98 void ProtectionDomainCacheTable::verify() {
99 verify_table<ProtectionDomainCacheEntry>("Protection Domain Table");
100 }
101
102 oop ProtectionDomainCacheEntry::object() {
103 return literal().resolve();
104 }
105
106 oop ProtectionDomainEntry::object() {
119 }
120
121 void ProtectionDomainCacheEntry::verify() {
122 guarantee(object_no_keepalive() == NULL || oopDesc::is_oop(object_no_keepalive()), "must be an oop");
123 }
124
125 ProtectionDomainCacheEntry* ProtectionDomainCacheTable::get(Handle protection_domain) {
126 unsigned int hash = compute_hash(protection_domain);
127 int index = hash_to_index(hash);
128
129 ProtectionDomainCacheEntry* entry = find_entry(index, protection_domain);
130 if (entry == NULL) {
131 entry = add_entry(index, hash, protection_domain);
132 }
133 // keep entry alive
134 (void)entry->object();
135 return entry;
136 }
137
138 ProtectionDomainCacheEntry* ProtectionDomainCacheTable::find_entry(int index, Handle protection_domain) {
139 assert_locked_or_safepoint(SystemDictionary_lock);
140 for (ProtectionDomainCacheEntry* e = bucket(index); e != NULL; e = e->next()) {
141 if (oopDesc::equals(e->object_no_keepalive(), protection_domain())) {
142 return e;
143 }
144 }
145
146 return NULL;
147 }
148
149 ProtectionDomainCacheEntry* ProtectionDomainCacheTable::add_entry(int index, unsigned int hash, Handle protection_domain) {
150 assert_locked_or_safepoint(SystemDictionary_lock);
151 assert(index == index_for(protection_domain), "incorrect index?");
152 assert(find_entry(index, protection_domain) == NULL, "no double entry");
153
154 LogTarget(Debug, protectiondomain, table) lt;
155 if (lt.is_enabled()) {
156 LogStream ls(lt);
157 ls.print("protection domain added ");
158 protection_domain->print_value_on(&ls);
159 ls.cr();
160 }
161 ClassLoaderWeakHandle w = ClassLoaderWeakHandle::create(protection_domain);
162 ProtectionDomainCacheEntry* p = new_entry(hash, w);
163 Hashtable<ClassLoaderWeakHandle, mtClass>::add_entry(index, p);
164 return p;
165 }
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